[ARC5] When without a BC456, what do you use as a keying relay?

[WA5CAB--- via ARC5]

Jim,

As a rough rule of thumb, dynamotor and inverter starter relays and DC 
power supplies should be rated at least three times the dynamotor or inverter 
rated FLA (Full Load Amps).  2X will probably work for a while.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 10/25/2014 10:12:42 AM Central Daylight Time, 
arc5 at mailman.qth.net writes: 
> Mark,
> 
> It's true that I do like to "get it right" the first time!  I attempt to 
> do this by asking lots of  questions from more experienced folks such as 
> yourself, so I can avoid the same mistakes. I have some very good relays that 
> I use for antenna switching and are good for ARC5 receiver control, but it 
> looks like they won't cut it for keying and would be and marginal for the 
> TX LV dynamotor control (15A at 30V). I think the start current is around 15-18 
> amps if the run amps is listed as 9 amps?
> I have some medium voltage reed relays from an instrumentation scanner. 
> They are rated at 200V @ 250ma but the coils are 5v ... a resistor will fix 
> that problem... still, the contact ratings are not up to snuff. 
> 
> Most of the parts have been collected, so now I am in the 'layout phase" 
> and I need to know what kind of space and mounting is required. I would 
> rather put an adequate device in that plan so the chassis doesn't get the 
> "swiss cheese" look from various failed devices having been mounted, not to 
> mention the frustration of it having failed.
> 
> The plan is to take this stuff "on tour" occasionally, so it has to look 
> half way decent and function reliably.
> 
> Thanks,
> Jim AC2EU